A key ring is used daily and so it can be a highly effective promotional item if the layout incorporates a logo, crest or event details. Key rings are also used as recognition and award items by corporations, law enforcement agencies, fraternal organizations, schools and municipalities. Materials Die Struck; - Brass, Bronze, Copper,   Nickel Silver - Sterling Silver, Gold Fill Finishes Highlights - Polished or satin Background - Antiqued or frosted Color fill is an option.